/Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/Operations/IntrinsicCorrespondenceUtils.h
the number of surface edges that cross this intrinsic edge. Note: it is the responsibility of the caller to ensure IntrinsicEID is a valid edge on the intrinsic mesh.
int32 NumEdgeCrossing ( const int32 IntrinsicEID ) const